Onyx Drop Necklace - Black and Gold Long Layering Necklace on Gold Filled Satellite Chain - Size: 20x18mm Note that due to the handmade nature of these genuine stones, measurements are approximately and might vary slightly for each stone. Chain: Available in 18 or 20 inches Chain Material: 14k Gold Filled with spring ring clasp. Bail of the pendant is Vermeil Gold (14k gold plated over Sterling Silver) Model is wearing 20 inch chain.